FR 6926 then TK 1856 at Barcelona
Rome → Barcelona → Istanbul
Timetable, Barcelona time
20:20FR 6926 from Rome at the gate
18:20TK 1856 to Istanbul leaves the gate
22 h apart on the timetable, overnight
TK 1856 leaves 22 h after FR 6926 arrives on the timetable: more than half a day, so not a connection we count.